Which situations might cause two observers (A and B) to measure different frequencies for the same vibrating object? Select the two correct answers. (2 points)

Question

Responses

Observer A and Observer B are stationary but at different distances from the vibrating object.
Observer A and Observer B are stationary but at different distances from the vibrating object.

Observer A and Observer B are both stationary and at the same distance from the object.
Observer A and Observer B are both stationary and at the same distance from the object.

Observer A and Observer B are moving at different speeds relative to each other.
Observer A and Observer B are moving at different speeds relative to each other.

Observer A is stationary and Observer B is moving.

Answer 1

The correct answers are:

1. Observer A and Observer B are stationary but at different distances from the vibrating object.
2. Observer A and Observer B are moving at different speeds relative to each other.

In both of these situations, the observers' positions or motion relative to the vibrating object can affect the perceived frequency of the vibrations.